Solved New Radeon HD 7870 not detected

September 6, 2012 at 16:24:25
Specs: Windows 7 SP1 64 bits, i5-3570k/8 Gb
Hello, I just changed my GTX 570 (defective) for a Gigabyte Radeon HD 7870 2GB. I uninstalled my NVIDIA drivers with driver sweeper and all. When I open my computer, my card is detected as Standard VGA and when I install the ATI drivers, my card is not detected either. The ATI Technologies folder is still empty. I even tried to reset my BIOS.

My motherboard is a MSI Z77A-G45 (pci-e 3.0 compatible)

Is this a DOA card? Thanks for your answers.


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#1
September 7, 2012 at 01:42:25
I believe the issue here is OS and not hardware. Use GPUz to see if the video card is properly recognized.
http://filehippo.com/download_gpuz/

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#2
September 7, 2012 at 06:17:50
Make sure that your BIOS set up is properly set as far as the PCIe port as the primary video or if possible "Use PCIe video when card it present" or similar since this could be the problem with both of your cards.

Post your power supply make, model, Wattage, and (most important) Amperage on the 12Volt rail(s). Also note that this card lists the requirements: "550-watt power supply with a minimum of 38 amps on the +12 volt rail" with the 38 Amps being the more important part here. If your power supply is not up to the requirements or you are not properly connecting the PCIe 6pin connectors, your problem may be coming from there. Note that the use of PCIe power adapters when you do not have them (or only one) on your power supply requires you to use the Y connector with each one plugged into 4pin Molex plugs on 2 different wire runs in order to draw enough current. This also means that using Molex connectors on the same run for even the 'other' adapter is not going to deliver enough current to the card.
Please supply these details to help evaluate the problem and review your installation in light of this information.

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#3
September 7, 2012 at 07:51:28
✔ Best Answer
I have some news, but I will anwer your questions before.

I have a CoolerMaster 750W, so this is more than enough. My rail is at 12.038 volts and I have plugged the 2x6 pins connectors.

I have done something so install it, tell me if everything is ok. I went into device manager and right clicked on the stardard VGA and went to properties. There, I chose to manually install the drivers from a file on my PC and I selected the 12.8 drivers from Radeon. Now it is detected as Radeon HD 7800 series. Is this how it is supposed to be? Nothing detect it as HD 7870 precisely. I can open my games, but I do not have Catalyst center, etc.

What do you think?


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#4
September 7, 2012 at 08:36:38
As i said earlier this is OS issue. U can try to repair but if that doesn't work u will to start from scratch. Next time uninstall the driver without the driver sweeper.

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#5
September 7, 2012 at 10:03:26
Are you saying that I should do a clean install of Windows 7 ? Because right now, it shows Radeon 7000 series, and not 7870, even in GPU-z

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#6
September 7, 2012 at 12:05:24
"Now it is detected as Radeon HD 7800 series. Is this how it is supposed to be? Nothing detect it as HD 7870 precisely. I can open my games, but I do not have Catalyst center, etc."

As long as your games are running properly and the Windows desktop is displayed at the correct resolution, the correct driver is installed. AMD uses a unified driver model. One driver fits all of their modern consumer cards.

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